When my daughter plays some on-line games, they can't always run with the latest update of flash (and don't recognise it), and we get a similar message, because the game can only use an earlier version (and because that isn't found, it suggests downloading flash) - which I don't downgrade to - she just doesn't play that game.

I didn't necessarily mean to imply that you were sat around"gaming", but just trying to present a scenario where I had encountered something similar.

Flash is used to display both moving and still graphics, so it could be vaguely possible that the same situation may have occurred when you clicked on a link - maybe not.

If you're happy that you're correctly and securely (for PSI) updated, and don't want to go to the trouble of un- and re-installing flash, then you may just have to grin and bear it, for the time being, until someone else may have an idea.

As and when this pop-up re-occurs, try to make a note of exactly what you were doing/looking at, at the time.